Subject: [PATCH v1 04/12] mm/memory_hotplug: remove nid parameter from arch_remove_memory()

From: David Hildenbrand <[email-masked]>
Date: Mon, 7 Jun 2021 21:54:22 +0200

The parameter is unused, let's remove it.

Cc: Catalin Marinas <[email-masked]>
Cc: Will Deacon <[email-masked]>
Cc: Michael Ellerman <[email-masked]>
Cc: Benjamin Herrenschmidt <[email-masked]>
Cc: Paul Mackerras <[email-masked]>
Cc: Heiko Carstens <[email-masked]>
Cc: Vasily Gorbik <[email-masked]>
Cc: Christian Borntraeger <[email-masked]>
Cc: Yoshinori Sato <[email-masked]>
Cc: Rich Felker <[email-masked]>
Cc: Dave Hansen <[email-masked]>
Cc: Andy Lutomirski <[email-masked]>
Cc: Peter Zijlstra <[email-masked]>
Cc: Thomas Gleixner <[email-masked]>
Cc: Ingo Molnar <[email-masked]>
Cc: Borislav Petkov <[email-masked]>
Cc: [email-masked]
Cc: "H. Peter Anvin" <[email-masked]>
Cc: Andrew Morton <[email-masked]>
Cc: Anshuman Khandual <[email-masked]>
Cc: Ard Biesheuvel <[email-masked]>
Cc: Mike Rapoport <[email-masked]>
Cc: Nicholas Piggin <[email-masked]>
Cc: Pavel Tatashin <[email-masked]>
Cc: Baoquan He <[email-masked]>
Cc: Laurent Dufour <[email-masked]>
Cc: Sergei Trofimovich <[email-masked]>
Cc: Kefeng Wang <[email-masked]>
Cc: Michel Lespinasse <[email-masked]>
Cc: Christophe Leroy <[email-masked]>
Cc: "Aneesh Kumar K.V" <[email-masked]>
Cc: Thiago Jung Bauermann <[email-masked]>
Cc: Joe Perches <[email-masked]>
Cc: Pierre Morel <[email-masked]>
Cc: Jia He <[email-masked]>
Cc: [email-masked]
Cc: [email-masked]
Cc: [email-masked]
Cc: [email-masked]
Cc: [email-masked]
Signed-off-by: David Hildenbrand <[email-masked]>
---
 arch/arm64/mm/mmu.c            | 3 +--
 arch/ia64/mm/init.c            | 3 +--
 arch/powerpc/mm/mem.c          | 3 +--
 arch/s390/mm/init.c            | 3 +--
 arch/sh/mm/init.c              | 3 +--
 arch/x86/mm/init_32.c          | 3 +--
 arch/x86/mm/init_64.c          | 3 +--
 include/linux/memory_hotplug.h | 3 +--
 mm/memory_hotplug.c            | 4 ++--
 mm/memremap.c                  | 5 +----
 10 files changed, 11 insertions(+), 22 deletions(-)

diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 89b66ef43a0f..c7821013f551 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -1502,8 +1502,7 @@ int arch_add_memory(int nid, u64 start, u64 size,
 	return ret;
 }
 
-void arch_remove_memory(int nid, u64 start, u64 size,
-			struct vmem_altmap *altmap)
+void arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
 {
 	unsigned long start_pfn = start >> PAGE_SHIFT;
 	unsigned long nr_pages = size >> PAGE_SHIFT;
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 064a967a7b6e..5c6da8d83c1a 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -484,8 +484,7 @@ int arch_add_memory(int nid, u64 start, u64 size,
 	return ret;
 }
 
-void arch_remove_memory(int nid, u64 start, u64 size,
-			struct vmem_altmap *altmap)
+void arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
 {
 	unsigned long start_pfn = start >> PAGE_SHIFT;
 	unsigned long nr_pages = size >> PAGE_SHIFT;
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 043bbeaf407c..fc5c36189c26 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -115,8 +115,7 @@ int __ref arch_add_memory(int nid, u64 start, u64 size,
 	return rc;
 }
 
-void __ref arch_remove_memory(int nid, u64 start, u64 size,
-			      struct vmem_altmap *altmap)
+void __ref arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
 {
 	unsigned long start_pfn = start >> PAGE_SHIFT;
 	unsigned long nr_pages = size >> PAGE_SHIFT;
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index 8ac710de1ab1..d85bd7f5d8dc 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -306,8 +306,7 @@ int arch_add_memory(int nid, u64 start, u64 size,
 	return rc;
 }
 
-void arch_remove_memory(int nid, u64 start, u64 size,
-			struct vmem_altmap *altmap)
+void arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
 {
 	unsigned long start_pfn = start >> PAGE_SHIFT;
 	unsigned long nr_pages = size >> PAGE_SHIFT;
diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index 168d7d4dd735..d74daf68e59e 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -414,8 +414,7 @@ int arch_add_memory(int nid, u64 start, u64 size,
 	return ret;
 }
 
-void arch_remove_memory(int nid, u64 start, u64 size,
-			struct vmem_altmap *altmap)
+void arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
 {
 	unsigned long start_pfn = PFN_DOWN(start);
 	unsigned long nr_pages = size >> PAGE_SHIFT;
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 21ffb03f6c72..5e82aafb5b49 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -801,8 +801,7 @@ int arch_add_memory(int nid, u64 start, u64 size,
 	return __add_pages(nid, start_pfn, nr_pages, params);
 }
 
-void arch_remove_memory(int nid, u64 start, u64 size,
-			struct vmem_altmap *altmap)
+void arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
 {
 	unsigned long start_pfn = start >> PAGE_SHIFT;
 	unsigned long nr_pages = size >> PAGE_SHIFT;
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index e527d829e1ed..d0296c081607 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -1254,8 +1254,7 @@ kernel_physical_mapping_remove(unsigned long start, unsigned long end)
 	remove_pagetable(start, end, true, NULL);
 }
 
-void __ref arch_remove_memory(int nid, u64 start, u64 size,
-			      struct vmem_altmap *altmap)
+void __ref arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
 {
 	unsigned long start_pfn = start >> PAGE_SHIFT;
 	unsigned long nr_pages = size >> PAGE_SHIFT;
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index 571734fd95bd..1d8d09c029c9 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -142,8 +142,7 @@ static inline bool movable_node_is_enabled(void)
 	return movable_node_enabled;
 }
 
-extern void arch_remove_memory(int nid, u64 start, u64 size,
-			       struct vmem_altmap *altmap);
+extern void arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap);
 extern void __remove_pages(unsigned long start_pfn, unsigned long nr_pages,
 			   struct vmem_altmap *altmap);
 
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 7206787ac5a9..f9be66bbd847 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1431,7 +1431,7 @@ int __ref add_memory_resource(int nid, struct resource *res, mhp_t mhp_flags)
 	/* create memory block devices after memory was added */
 	ret = create_memory_block_devices(start, size, mhp_altmap.alloc);
 	if (ret) {
-		arch_remove_memory(nid, start, size, NULL);
+		arch_remove_memory(start, size, NULL);
 		goto error;
 	}
 
@@ -2211,7 +2211,7 @@ static int __ref try_remove_memory(int nid, u64 start, u64 size)
 
 	mem_hotplug_begin();
 
-	arch_remove_memory(nid, start, size, altmap);
+	arch_remove_memory(start, size, altmap);
 
 	if (IS_ENABLED(CONFIG_ARCH_KEEP_MEMBLOCK)) {
 		memblock_free(start, size);
diff --git a/mm/memremap.c b/mm/memremap.c
index 15a074ffb8d7..ed593bf87109 100644
--- a/mm/memremap.c
+++ b/mm/memremap.c
@@ -140,14 +140,11 @@ static void pageunmap_range(struct dev_pagemap *pgmap, int range_id)
 {
 	struct range *range = &pgmap->ranges[range_id];
 	struct page *first_page;
-	int nid;
 
 	/* make sure to access a memmap that was actually initialized */
 	first_page = pfn_to_page(pfn_first(pgmap, range_id));
 
 	/* pages are dead and unused, undo the arch mapping */
-	nid = page_to_nid(first_page);
-
 	mem_hotplug_begin();
 	remove_pfn_range_from_zone(page_zone(first_page), PHYS_PFN(range->start),
 				   PHYS_PFN(range_len(range)));
@@ -155,7 +152,7 @@ static void pageunmap_range(struct dev_pagemap *pgmap, int range_id)
 		__remove_pages(PHYS_PFN(range->start),
 			       PHYS_PFN(range_len(range)), NULL);
 	} else {
-		arch_remove_memory(nid, range->start, range_len(range),
+		arch_remove_memory(range->start, range_len(range),
 				pgmap_altmap(pgmap));
 		kasan_remove_zero_shadow(__va(range->start), range_len(range));
 	}
-- 
2.31.1